Exodus 18:14, 22

When Moses’ father-in-law saw everything that he was doing for the people, he said, “What is this that you are doing for the people? Why are you sitting alone [as a judge] with all the people standing around you from dawn to dusk?”

They shall judge the people at all times; have them bring every major dispute to you, but let them judge every minor dispute themselves. So it will be easier for you, and they will bear the burden with you.